dark, darkness, extinguish, heavy, obliterate

illumination, glow, sunlight, shine, glary, candlepower, penlight, cherenkov radiation, florescent, amber, sunbeams, cathode rays, luminosity, ray, fluorescent, klieg light, lux, reflectors, photocell, spotlights, red, darks, earthshine, sun, lamplight, daylight, phosphorescence, photoluminescence, glare, tint, green, mist, streetlamp, candelas, strobes, emittance, flickering, sunshine, dimming, glowworm, illuminance, sunrays, refract, sparkle, collimating, glints, lasers, shade, brightness, floodlights, annunciator, sheds, shimmer, headlights, luminescence, dapples, clerestories, sundog, flashlight, strobe light, searchlight, blue, shadows, underwings, brighter, candle, beacon, caustics, lumens, infrared, laser beam, darkening, photoflash, ultraviolet light, fluorescent lamp, light bulb, neons, cadmium sulfide, ultraviolet, firelight, flecking, epsilon aurigae, electroluminescent, zodiacal light, noonday, drear, fluorescence, haloes, phosphide, nebulosity, glimmering, houselights, alpenglow, halogen, iridescence, parabolic reflector, sunlamp, pallor, greenish blue, reflectivity, lamp, flashing, radiance, lights, lustre, flame, starlight, colour, moonlight, dawn, effulgence, incandescence, candlelight, lighter, darkish, lightest, heavy, reddish, dark, pale, yellowish, brownish, greyish, lightish, darker, grayish, bluish, brown, dusky, ashy, greenish, pinkish, silvery

anchor light, aura, beam, beam of light, blinker, brightness, candlelight, candle flame, cigarette lighter, corona, counterglow, daylight, enkindle, firelight, flare up, flood, floodlight, flood lamp, fluorescence, friar's lantern, friction match, fuse, fusee, fuze, fuzee, gaslight, gegenschein, glory, glow, glowing, half-light, halo, headlamp, headlight, highlight, highlighting, houselights, ignis fatuus, illuminance, illumination, incandescence, jack-o'-lantern, kindle, lamplight, light beam, light up, lucifer, luminescence, match, moon, moonlight, moonshine, nightlight, nimbus, photoflood, pocket lighter, primer, radiance, ray, ray of light, reignite, riding lamp, riding light, searchlight, set ablaze, set afire, set aflame, set on fire, shaft, shaft of light, spotlight, starlight, stoplight, streamer, strip lighting, sun, sunlight, sunniness, sunshine, theater light, torch, torchlight, traffic light, traffic signal, twilight, will-o'-the-wisp

., ablazep, absolute magnitude, absorb, absorbed, absorptance, absorption band, absorption coefficient, abyssal zone, acer saccharinum, achromatic, adaptation, aditya, aeriform, afternoon tea, aglitterp, agrostis nebulosa, ahura mazda, airy, alabaster, albedo, albert einstein, almond willow, alnus crispa, alnus maritima, alnus veridis crispa, alpine ash, altair, amber, american beech, ametropia, anchor light, angel cake, angel food cake, angle of extinction, annihilating, anxiety reaction, aperture, aphotic, aplite, apollo, araucaria cunninghamii, arcturus, arc lamp, arc light, armored car, armoured car, arthur compton, arthur holly compton, ash gray, ash grey, assimilate, asterism, astigmatic, astigmatism, astigmia, atomic number 12, atomic number 19, atomic number 2, atomic number 20, atomic number 22, atomic number 34, atomic number 4, augustin jean fresnel, aura, aureole, aurora, automatic, automatic rifle, au pair, azure, backchat, backed, badminton, badminton racket, badminton racquet, bagatelle, balder, baldr, balibago, balloon sail, balsa, balsa raft, bandbox, banter, barndoor, basswood, bathe, battledore, be, beach ball, beacon, beacon light, beam, beaming, beamy, beam of light, beaujolais, beaver board, bedazzle, bedlington terrier, beige, belgian endive, bengal light, beryllium, binocular microscope, bioluminescent, bite, black, blackness, black hollander, black maire, blanched, blattella germanica, blaze, blind spot, blinker, blinking, block out, blond, blonde, blondness, blue-blindness, bluish green, boat paddle, bohr theory, bounce, bound, boxwood, brachychiton populneus, brake light, breakfast area, breakfast nook, break of day, break of the day, breeze block, bright, brightness, brightness level, brilliant, brioche, brougham, brownish-orange, buckskin, budgereegah, budgerigar, budgerygah, budgie, bulb, buoyant, burning, butternut, butternut tree, buttery, ca, calamus, calcium, calcium light, calisthenics, calisthenic exercise, callisthenics, callisthenic exercise, camassia quamash, camera, camp chair, canary, canary-yellow, candent, candle, candlelight, candlewood, candle flame, canoe, canopus, caper, cape kafferboom, caracolito, caravaggio, carbine, card table, carpenter's level, cartridge, casquet, casquetel, cassegrainian telescope, cat's eye, caucasian, caucasian race, caucasoid race, causerie, celery cabbage, ceratotherium simum, cerulean, cerulean blue, ceylon bowstring hemp, chain-smoke, change of color, chariot, chesapeake bay retriever, chiffon cake, chihuahuan spotted whiptail, chin-wag, chin-wagging, chinese cabbage, chinese celery, chink, chirpy, chitchat, christiaan huygens, christian huygens, chromatic, cinder block, claro, clear, clearstory, clerestory, click, clink, clinker block, clinking, cloud grass, cnemidophorus exsanguis, cobwebby, cockatoo, cockcrow, cockleshell, cocozelle, coefficient of absorption, coelostat, collation, collimator, color, coloring, color spectrum, colour, colouring, colza oil, combustion, comedy, common camas, common oak, compound eye, compound microscope, compton, concave lens, condenser, constant, contact, continuous, converging lens, convex lens, cord, corkwood, corkwood tree, corn, corona, corpuscular theory, corpuscular theory of light, coruscant, coude system, coude telescope, counterglow, cow pony, crack, crape, crepe, crisphead lettuce, critical angle, cross-examination, crotonbug, croton bug, crystalline, crystalline lens, crystal clear, currajong, cursor, curvet, cytophotometer, dab, dacrycarpus dacrydioides, dalea spinosa, daltonism, danish, danish pastry, dark, dark-field microscope, darkened, darkening, darkly, darkness, dark field illumination, dark ground illumination, dark lantern, dark matter, dark red, dawn, dawning, day, daybreak, daylight, daylong, dayspring, daytime, day blindness, daze, dazzle, dazzled, define, deflagrate, deflective, demerara, demerara sugar, denebola, dense, densitometry, detector, deuteranopia, devastating, diaphanous, diatomaceous earth, diatomite, diceros simus, dichromacy, dichromasy, dichromatism, dichromatopsia, dichromia, diffract, diffraction, diffraction grating, diffused, diffuser, diffusing screen, diffusor, dim, dimmer, discharge lamp, diverging lens, dizzily, doldrums, dolomite, douse, down, downiness, doze, drimys winteri, drippy, drizzle, drizzly, drop, drowse, dulcimer, dull, dully, dun, dust, easy, ecru, edison, effulgence, effulgent, einstein, einstein's special theory of relativity, electric-discharge lamp, electric-light bulb, electric cord, electric eye, electric light, electron microscope, electroretinogram, elucidation, elves, emanation, emit, emitting, emmetropia, emphasis, emulsion, english oak, engulf, eprom, erasable programmable read-only memory, erythrina caffra, etiolate, etiolated, eucalyptus coriacea, eucalyptus delegatensis, eucalyptus pauciflora, eve, evening, excogitate, expose, exposure, exposure meter, extinction angle, extraneous, fabric, fagus americana, fagus grandifolia, faintly, fair, fairish, fairness, fairy light, fawn, feather, featheriness, fenestella, fiberoptics, fiber optics, fiber optic cable, fibreoptics, fibre optics, fibre optic cable, filmy, fire, firelight, firestone, first light, flageolet, flame, flaming, flannel, flare, flash, flashbulb, flasher, flashgun, flashing, flashlight fish, flash bulb, flash lamp, flat, flick, flicker, flimsy, flip, flood, floodlight, flood lamp, fluff, fluffiness, fluor, fluorescence, fluorescence microscopy, fluorescent, fluorite, fluorspar, flurry, focal point, focus, focused, focussed, foil, footlight, footlights, foucault, foulard, fowling piece, franz lehar, fraxinus latifolia, fraxinus oregona, french door, french endive, fresnel, friar's lantern, frisbee, frolic, fulgid, fusil, fusilier, fusion bomb, fuzzed, fuzzy, gab, gabfest, gad, galega officinalis, gambol, gas-discharge lamp, gaslight, gauzy, gegenschein, generalized anxiety disorder, genus madia, genus mimosa, german cockroach, ghost gum, giddily, gig, gin mill, give-and-take, give off, give out, glass fiber, glass fibre, gleam, gleaming, glimmer, glint, glinting, glistening, glistering, glittering, glittery, gloriole, glory, glossy, glow, glucinium, goat's rue, goat rue, golden fern, golden hamster, gossamer, gossip, grapnel, grapnel anchor, grass parakeet, grating, gravitation wave, gravity wave, gray, grayish brown, green-blindness, green alder, green light, gregorian telescope, greyish brown, ground glass, guideline, h-bomb, habergeon, half-and-half, half-light, halo, hand-held, handheld, hand glass, hand luggage, haricot, hazel, he, headlamp, headlight, heatless, heat lightning, heavy, heimdal, heimdall, heimdallr, helipterum manglesii, helium, hemeralopia, herschel, hibiscus tiliaceus, holography, homochromatic, hooke, hoop, hoop pine, horse latitude, hurdle, hussar, huygens, hydrogen bomb, iceberg, iceberg lettuce, idiot light, ignis fatuus, illuminant, illuminated, illuminating, image orthicon, imbibe, impenetrable, implosion, impressionism, incandescence, incandescent, incandescent lamp, incidence, index of refraction, indicator lamp, indirect, ineffectually, inflamed, inflation, infrared, infrared emission, infrared light, infrared radiation, inquisitive, intensify, in darkness, iodine-125, irradiate, irradiation, italian vegetable marrow, j. c. maxwell, jack-o'-lantern, jacklight, jade, jade green, james clerk maxwell, jan van der meer, jan vermeer, japanese beech, japanese oak, jaywalk, jean bernard leon foucault, jones' penstemon, joseph mallord william turner, juglans cinerea, kaffir boom, kahikatea, kayak, kernite, kerosene lamp, kerosine lamp, kerr cell, kieselguhr, kinetoscope, kiss, kitchen match, kite, klieg light, knock, kon tiki, kurrajong, kuvasz, laboratory coat, lab coat, lambency, lamp, lamplight, lampshade, lamp shade, lantern, lantern-fly, lantern fly, laser, laser-guided bomb, laser beam, lazuline, lead, leak, leap, leaping, leash, leavened, leccinum fibrillosum, led, lehar, leitneria floridana, lens, lense, lens system, lgb, lidar, light-armed, light-colored, light-duty, light-emitting diode, light-fingered, light-footed, light-haired, light-handed, light-handedly, light-headed, light-headedly, light-heartedly, light-sensitive, light-tight, lightbulb, lighted, lighthouse, lighting, lighting fixture, lightless, lightlessness, lightly-armed, lightly armored, lightly armoured, lightness, lightning, lightproof, lightsomely, light beam, light brown, light bulb, light cream, light filter, light hour, light meter, light minute, light reaction, light reflex, light second, light speed, light time, light year, limelight, limpid, limpidity, linden, lit, lite, livid, lm, loose, lovebird, lucid, luciferin, lucifugal, lucifugous, luging, lumen, luminance, luminescence, luminescent, luminism, luminosity, luminousness, luminous energy, luminous flux, lunar eclipse, lunette, luster, lustre, lustrous, lyric, machine rifle, madia, madras, magazine, magic eye, magnesium, magnifying glass, mahagua, mahoe, majagua, make, mallet, manichaeanism, manichaeism, manila, manila paper, manilla, manilla paper, mao jacket, marble cake, marupa, marvin neil simon, mask, mat, match, matt, matte, matted, maxwell, mazdaism, melopsittacus undulatus, mercury-vapor lamp, merthiolate, mesocricetus auratus, meteor, methanol, methyl alcohol, mezzotint, mg, michelangelo merisi da caravaggio, michelson-morley experiment, milky way, milky way galaxy, milky way system, milk bar, mimosa sensitiva, mineral wool, miniver, miosis, mirror, mirrorlike, mithra, mithras, mizzle, monkey ladder, monochromatic, moon, moonlight, moonshine, moon blindness, moreton bay pine, morning, mosaic, mountain oak, mousse, music rack, music stand, mydriasis, myosis, navigation light, neil simon, new zealand dacryberry, new zealand white pine, nicol prism, night-light, night blindness, nimbus, north, nosh, nouvelle cuisine, nusku, nyctalopia, occult, ochroma lagopus, oil lamp, old style, old style font, olea cunninghamii, oligomenorrhea, one-way light time, onionskin, opacity, opalesce, opaque, opaqueness, opening, opsin, optical, optical condenser, optical device, optical fiber, optical fibre, optical maser, optical opacity, optical phenomenon, optical pyrometer, optical telescope, optics, optic axis, optic disc, optic disk, oregon ash, ormazd, ormuzd, orthicon, orthochromatic film, otoscope, overexpose, overexposure, owlt, paddle, pale, paleness, palfrey, pallid, palomino, paloverde, panchromatic film, panel light, parabolic mirror, parsec, pastel, pat, pate a choux, pate feuillete, patter, pedunculate oak, pelican crossing, pellucid, pellucidity, pellucidness, pencil, penstemon dolius, pepper-and-salt, percolate, perky, persiflage, pharos, phenyl salicylate, phoebus, phoebus apollo, phosphorescent, photalgia, photic, photo, photoblepharon palpebratus, photocell, photochemical, photochemical exchange, photochemical reaction, photochemistry, photoconductive cell, photoelectricity, photoelectric cell, photoflash, photoflood, photogenic epilepsy, photograph, photographic camera, photographic emulsion, photographic material, photographic paper, photometer, photometry, photophobia, photosensitise, photosensitive, photosensitize, phototherapy, phototropism, photovoltaic, pic, pickup, pickup arm, pickup truck, pieter zeeman, pilot lamp, pilot light, pineal eye, ping-pong, ping-pong ball, pink, pinkish, pinus glabra, pitch, pitch blackness, pith hat, pith helmet, pitter-patter, pityrogramma calomelanos aureoflava, pizzicato, plane-polarized, play, plexiglas, plexiglass, plimsoll, plumage, plume, podocarpus dacrydioides, pointer, polarimeter, polarisation, polariscope, polarization, polarize, polaroid, polychromatic, polyester, pool, poor, poplar, poplar tree, popover, portability, portable, potassium, pothouse, pouf paste, precision rifle, principal axis, principle of superposition, prismatic, projector, propagate, protanopia, proxima, proxima centauri, pruning shears, ptilonorhynchus violaceus, pub, public house, puff, puff batter, puff of air, puff paste, pumice, pumice stone, punk, punnet, pupillary reflex, purau, put out, pyinma, pyroscope, quantum field theory, quercus grosseserrata, quercus mongolica, quercus robur, racing gig, racing shell, radial, radiance, radiancy, radiant, radiate, radiogram, radiograph, radiography, raffia, rage, raillery, rainbow, raised doughnut, rake up, rana sylvatica, rap, rapeseed oil, rape oil, ray, rayleigh disk, ray of light, reading lamp, red-blindness, reddened, red beech, red sprites, refection, reflect, reflected, reflection, reflective, reflective power, reflexion, refract, refraction, refractive, refractive index, refreshment, refulgence, refulgency, refulgent, rest energy, retina, retinal, retinal purple, retinal rod, retinene, reverberate, rhodanthe, rhodanthe manglesii, rhodopsin, riding lamp, riding light, rinse, robert hooke, rochon prism, rocket, rock wool, rod, rod cell, roll, romp, room light, running light, running shoe, ruptiliocarpon caracolito, rustle, rustling, sabayon, sack, salix amygdalina, salix triandra, sallade, sallet, salol, saloon, saltation, salwar, sandy, sansevieria zeylanica, santa clara, sapphire, sapphirine, sapwood, saree, sari, satin bird, satin bowerbird, scan, scanning, scattering, scintillant, scintillate, scintillating, scintillation, scintillation counter, screen saver, scuffer, se, searchlight, seaside alder, seasoner, secpar, see-through, seeker, seersucker, selenium, semitransparency, semitransparent, sensing element, sensitise, sensitive plant, sensitize, sensitometer, sensor, shade, shaded, shadiness, shading, shadowgraph, shadowiness, shaft, shaft of light, shalwar, sharp, sharply, sheen, sheeny, sheer, shell, shell parakeet, shimmer, shine, shiner, shininess, shining, shiny, shivering, shoot, shooting star, sibley tent, sidelight, significance, silver, silver bromide, silver gray, silver grey, silver maple, simarouba amara, simon, simple microscope, single cream, sir frederick william herschel, sir william herschel, skiagram, skiagraph, skiagraphy, sky, sky-blue, skyrocket, small stuff, small talk, smoke tree, snack, snack food, sniper rifle, snow-blind, snow-blinded, snow flurry, snow gum, sodium-vapor lamp, sodium-vapour lamp, sodium ethylmercurithiosalicylate, soft, softened, solarise, solarize, solar eclipse, sorrel, souffle, soured cream, sour cream, spar, spark, sparkling, sparklinga, sparkly, special relativity, special relativity theory, special theory of relativity, spectrophotometer, specular, speed of light, sponge cake, spot, spotlight, spring, sprinkle, sprinkling, sprit, sprites, spruce, spruce pine, star, starlight, start, starting signal, star sapphire, stellar, stigmatism, stoplight, streamer, strip lighting, strobe, strobe light, stroboscope, stroke, stroking, struthiomimus, styrofoam, subdued, suffuse, suffused, suffusive, sulky, sun, sun-ray, sunblock, sunray, sunrise, sunscreen, sunup, sun blocker, sun helmet, supper, surrey, surya, swan river everlasting, swarm, sweetness and light, switch, switch on, syrian hamster, table tennis, tack hammer, tan, tanning, tap, taphouse, tapping, tawny, tea, teacart, teahouse, tearoom, teashop, teatime, tea cart, tea parlor, tea parlour, tea trolley, tea wagon, tetartanopia, tether, thermonuclear bomb, the doldrums, thimerosal, third eye, thomas alva edison, thomas edison, thomas young, throw back, ti, tick, tickle, ting, tinkle, titanium, tittle-tattle, tobogganing, tone arm, topaz, topee, topi, torch, torchlight, toss, toss back, total darkness, trafficator, transform, translucence, translucency, translucent, translucent substance, transparent, transparently, transparent gem, transparent substance, transpire, trap, trip, tripping, trippingly, trip line, tritanopia, trowel, true tulipwood, tulipwood, tumbleweed, turkish boxwood, turner, turn indicator, turn signal, twilight, twilight zone, twinkle, twinkler, twinklinga, tyndall effect, ultramicroscope, ultraviolet, ultraviolet illumination, ultraviolet light, ultraviolet radiation, umbra, underexpose, underexposure, undomestic, undulatory theory, unearth, unearthly, unfrosted, unglazed, unreflected, uv, value, vaporous, variable, vaulting, verey pistol, vermeer, very pistol, virga, visible spectrum, visually impaired, visual cell, visual purple, visual sensation, voile, walker, walking shoe, wan, watermark, water bug, wave theory, wave theory of light, weapons carrier, weightless, well-lighted, wheat, wherry, whiff, whipped cream, whisper, whispering, white, whiteout, whitewood, white ash, white beech, white people, white pine, white poplar, white race, white rhinoceros, white walnut, wholesomely, wigwag, will-o'-the-wisp, william herschel, window, window blind, windsor green, winkle, winter's bark, winter's bark tree, withering, witloof, wollaston prism, wood-frog, wood alcohol, wood frog, wood spirit, writing board, xeroderma pigmentosum, xerographic copier, xerography, xerox, xerox machine, yacht chair, yellow-blindness, yellow poplar, yew, yorkshire pudding, young, zabaglione, zeeman, zimmer, zimmer frame, zoroastrianism

electromagnetic spectrum

actinic radiation, actinic ray, brainstorm, brainwave, come down, condition, descend, device, devolve, ethical motive, ethics, fall, friend, general knowledge, go down, illumination, insight, land, lighten, lighten up, morality, morals, pass, perspective, physical property, position, public knowledge, return, scene, set down, smoke, source of illumination, verve, view, visual property, visual signal, vitality

ablaze, abstemious, airy, alight, bantamweight, bioluminescent, bright, brightness, buoyant, candent, candescent, casual, chiffon, christ within, clean, clear, deficient, diet, digestible, dismount, easy, faint, fall, fat-free, fatless, featherlike, featherweight, feathery, fire up, flimsy, floaty, floodlighted, floodlit, fluorescent, flyweight, fooling, friable, frivolous, gentle, get down, get off, idle, ignite, igniter, ignitor, ill, illume, illuminate, illuminated, illuminating, illumination, illumine, incandescent, inflamed, inner light, insignificant, insufficient, lamplit, leavened, light-armed, light-duty, light-footed, light-headed, light source, light up, light within, lighted, lighter, lighting, lighting-up, lightly, lightly-armed, lightness, lightsome, lightweight, lit, lite, livid, loose, low-cal, low-density, luminance, luminescent, luminosity, luminousness, nonfat, pale, palish, pastel, perch, phosphorescent, powdery, promiscuous, pure, reddened, sandy, scant, shallow, short, sick